This was a difficult Gigapan to get right.
Only 14 x 12 pictures 168 taken on my Canon Sx1. I had much difficulty with road traffic (buses etc) obscuring the building as the road is extremely busy, but with many images "placed" in the shot using Photoshop after stitching, it seems to have worked.
Art exhibition by Damion Hirst is on at the moment.
This is just up the road from Bristol City Museum which staged a record breaking show of Banksy's art in 2009 See: http://www.gigapan.org/gigapans/31606/ or for all my gigapans put krbristol rodgopan in the search box.